The slider is only on the homepage. The blank space you're seeing on the posts is because you have adsense inserted there but Adsense is not display ads. Your Adsense account may have issues. You should login and see what it is.

Regarding the "read more" link. When we built the site there were no "read more" links. So that is something that was added later on. I'm not sure what the issue is there.

Yes, social monetize me will add "read more" to adverts. SMM also has the facility to add extra text to pages it creates with adverts. This makes it easy to create posts that look more like articles. You can also spin the text, so you can have different pieces of text on similar adverts, so they don't look the same. You can set this up separately (in notepad, for instance) before creating the adverts, so it's ready to copy and paste, when looking for items to advertise.